CVE-2026-73070: vim Stack-based Buffer Overflow

Vulnerability summary

CVE-2026-73070 is a medium (CVSS 6.8) Stack-based Buffer Overflow vulnerability in vim. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.6% of scored vulnerabilities.

Timeline

1. 11-08-2026
   PublishedVulnerability first disclosed.
2. 11-08-2026
   Last modifiedVulnerability information updated.

Description

Vim is an open source, command line text editor. Prior to 9.2.0842, the socket server backend in src/socketserver.c accepts unbounded client connections in socketserver_accept(), causing descriptors to overflow fd_set structures in src/channel.c and fixed-size struct pollfd arrays in src/os_unix.c, which allows a local process that can connect to the server socket to corrupt stack memory or terminate the Vim server. This issue is fixed in version 9.2.0842.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).